This article has statistics on inflation and how much the USD has gained or lost purchasing power at different time periods. According to the article, $100 in January 2021 is now worth $84.81 - or in other words, the USD has lost 15.19% of its purchasing power. This would make the Bitcoin ATH (in purchasing power, not "number fiat tokens") around $79.5k USD.

So Bitcoin above $80k means that ALL hodlers, even those who previously bought at the very pinnacle of the last cycle, are making gains.

What is the actual, inflation-adjusted ATH for Bitcoin around the world? Any inflation stats?